<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="vue_dev.js"></script>
</head>
<body>
    <div id="app">
        {{date | formatDate}}
    </div>
    <script>
        var padDate=function(value){
            return value<10?'0'+value:value;
        };
        var app=new Vue({
            el:'#app',
            data:{
                date:new Date()
            },
            filters:{
                formatDate:function (value) { 
                    var date=new Date(value);
                    var year=date.getFullYear();
                    var month=padDate(date.getMonth()+1);
                    var day=padDate(date.getDate());
                    var hours=padDate(date.getHours());
                    var minutes=padDate(date.getMinutes());
                    var seconds=padDate(date.getSeconds());
                    return year+'-'+month+'-'+day+'-'+hours+':'+minutes+':'+seconds;
                 }
            },
            mounted:function(){
                var _this=this;
                this.timer=setInterval(function(){
                    _this.data=new Date();
                },1000);
            },
            beforeDestroy:function() {
                if(this.timer){
                    clearInterval(this.timer);
                }
            }
        })
    </script>
</body>
</html>